制备工艺条件对纳米Ti_1-xS_xO₂ 薄膜光催化活性的影响

来源期刊：中南大学学报(自然科学版)2008年第6期

论文作者：许珂敬 尚超峰 李 芳

文章页码：1229 - 1232

关键词：纳米S-TiO₂薄膜；掺杂；溶胶-凝胶-浸渍提拉法；光催化活性

Key words：nano S-TiO₂ film; doping; sol-gel-dipping process; photocatalytic activity

摘    要：以硫脲为S的源物质，以钛酸丁酯为TiO₂的前驱体，以蜂窝陶瓷为载体，采用改进的溶胶-凝胶-浸渍提拉法制备Ti_1-xS_xO₂薄膜，探讨热处理温度、S掺杂量及涂膜等工艺条件对Ti_1-xS_xO₂薄膜的光催化活性的影响。研究结果表明：掺硫TiO₂光催化剂在可见光区的吸收强度增大；采用溶胶-凝胶-浸渍提拉法制备Ti_1-xS_xO₂光催化剂的最佳工艺条件是：硫脲与Ti(OBu)₄摩尔比为3:1，煅烧温度为600 ℃，涂膜层数为6。在最佳工艺条件下制备的Ti_1-xS_xO₂纳米薄膜对亚甲基蓝的降解率可达100%。

Abstract: With thiourea as the source substance of S, with Titanium tetrabutoxide (Ti(OC₄H₉)₄ as the precursor of titanium dioxide and with honeycomb ceramics as carriers, S-TiO₂ films were prepared by a modified sol-gel-dipping process. Effects of the heat treating temperature, the amount of sulfur-doping and the technological conditions of coating films on the photocatalytic activity of Ti_1-xS_xO₂ films were discussed. The results show that the adsorption activity of TiO₂ photocatalysts with suitable sulfur-doping in visible light increases. The optimal technological conditions of Ti_1-xS_xO₂ photocatalysts prepared by sol-gel-dipping process are as follows: The molar ratio of thiourea and titanium tetrabutoxide is 3:1, the calcinations temperature is 600 ℃ and the times of coating film is 6. The degradation of Ti_1-xS_xO₂ nano-film prepared at the optical technological conditions for methylene blue may reach 100%.

基金信息：国家“863”计划课题成果推广资助项目